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Virtual tour

How it works

  • The polychromatic neutron beam from the hot neutron beam tube H8 is diffracted by the monochromator, where a single wavelength is selected.
  • The diffracted beam passes through a filter to remove the harmonics and then through slits to limit its aperture.
  • This quasi-monochromatic beam is scattered by the sample: usually a gas, a liquid, an amorphous or a powdered material.
  • The intensity of the scattered neutrons is measured by an array of nine microstrip detectors (64-cell, 3He).

Typical diffraction patterns

d4 diff patern.jpg

The graph shows the diffraction patterns for H2O and D2O as measured on D4. After Fourier transformation such diffraction patterns provide information about the spatial correlations between nuclei in the sample.